CN111275879A - Currency identification method and device and mobile terminal - Google Patents

Currency identification method and device and mobile terminal Download PDF

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Publication number
CN111275879A
CN111275879A CN202010104266.6A CN202010104266A CN111275879A CN 111275879 A CN111275879 A CN 111275879A CN 202010104266 A CN202010104266 A CN 202010104266A CN 111275879 A CN111275879 A CN 111275879A
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China
Prior art keywords
currency
information
image information
detected
standard
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CN202010104266.6A
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Chinese (zh)
Inventor
邹剑
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Guangdong Oppo Mobile Telecommunications Corp Ltd
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Guangdong Oppo Mobile Telecommunications Corp Ltd
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Priority to CN202010104266.6A priority Critical patent/CN111275879A/en
Publication of CN111275879A publication Critical patent/CN111275879A/en
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    • GPHYSICS
    • G07CHECKING-DEVICES
    • G07DHANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
    • G07D7/00Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
    • G07D7/20Testing patterns thereon
    • GPHYSICS
    • G07CHECKING-DEVICES
    • G07DHANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
    • G07D5/00Testing specially adapted to determine the identity or genuineness of coins, e.g. for segregating coins which are unacceptable or alien to a currency
    • G07D5/005Testing the surface pattern, e.g. relief

Abstract

The application is applicable to the technical field of currency identification, and provides a currency identification method, a device and a mobile terminal, which comprise: if a camera of the mobile terminal is started and a currency detection instruction is received, acquiring image information corresponding to currency to be detected in front of the camera, wherein the image information comprises depth information and color information; comparing the image information of the currency to be detected with the image information of standard currency; and determining whether the currency to be detected is true currency or not according to the comparison result. The method can improve the identification accuracy of the currency.

Description

Currency identification method and device and mobile terminal
Technical Field
The present application relates to the field of currency recognition technologies, and in particular, to a currency recognition method, apparatus, mobile terminal, and computer-readable storage medium.
Background
Various techniques are rapidly developed, and techniques for manufacturing counterfeit money are also rapidly developed. Counterfeit money refers to money produced by simulating the patterns, colors, etc. of genuine money by various means.
At present, counterfeit money is mainly identified through a money printer, but the money printer is inconvenient to carry about due to certain volume, so that a user is inconvenient to identify the authenticity of the money in time.
Disclosure of Invention
The embodiment of the application provides a currency identification method, a currency identification device, a mobile terminal and a computer readable storage medium, which can solve the problem that the existing method is difficult to identify the authenticity of currency in time.
In a first aspect, an embodiment of the present application provides a currency identification method, which is applied to a mobile terminal, and the currency identification method includes:
if a camera of the mobile terminal is started and a currency detection instruction is received, acquiring image information corresponding to currency to be detected in front of the camera, wherein the image information comprises depth information and color information;
comparing the image information of the currency to be detected with the image information of standard currency;
and determining whether the currency to be detected is true currency or not according to the comparison result.
In a second aspect, an embodiment of the present application provides a currency identification apparatus, applied to a mobile terminal, including:
the currency detection device comprises an image information acquisition unit, a currency detection unit and a currency detection unit, wherein the image information acquisition unit is used for acquiring image information corresponding to currency to be detected in front of a camera if the camera of the mobile terminal is started and receives a currency detection instruction, and the image information comprises depth of field information and color information;
an image information comparing unit for comparing the image information of the money to be measured with the image information of the standard money;
and the currency identification unit is used for determining whether the currency to be detected is true currency or not according to the comparison result.
In a third aspect, an embodiment of the present application provides a mobile terminal, including a memory, a processor, and a computer program stored in the memory and executable on the processor, where the processor implements the method according to the first aspect when executing the computer program.
In a fourth aspect, the present application provides a computer-readable storage medium, which stores a computer program, and when the computer program is executed by a processor, the computer program implements the method according to the first aspect.
In a fifth aspect, embodiments of the present application provide a computer program product, which, when run on a terminal device, causes the mobile terminal to execute the method according to the first aspect.
Compared with the prior art, the embodiment of the application has the advantages that:
since the user purchases the mobile terminal and often carries the mobile terminal, the real and false money can be identified by the mobile terminal, so that the timeliness of identification can be improved. Moreover, the acquired image information comprises depth information and color information, so that the accuracy of the judgment result can be improved by determining whether the currency is true according to the comparison result of the depth information and the color information of the currency with the depth information and the color information of the standard currency.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings used in the embodiments or the description of the prior art will be briefly described below.
FIG. 1 is a schematic flow chart diagram illustrating a currency recognition method according to an embodiment of the present application;
FIG. 2 is a schematic diagram of a 100 RMB banknote provided in an embodiment of the present application;
FIG. 3 is a schematic view of a currency recognition apparatus according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of a mobile terminal according to an embodiment of the present application.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the present application. It will be apparent, however, to one skilled in the art that the present application may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It should also be understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.
As used in this specification and the appended claims, the term "if" may be interpreted contextually as "when", "upon" or "in response to" determining "or" in response to detecting ". Similarly, the phrase "if it is determined" or "if a [ described condition or event ] is detected" may be interpreted contextually to mean "upon determining" or "in response to determining" or "upon detecting [ described condition or event ]" or "in response to detecting [ described condition or event ]".
Reference throughout this specification to "one embodiment" or "some embodiments," or the like, means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the present application. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," or the like, in various places throughout this specification are not necessarily all referring to the same embodiment, but rather "one or more but not all embodiments" unless specifically stated otherwise. The terms "comprising," "including," "having," and variations thereof mean "including, but not limited to," unless expressly specified otherwise.
In real life, after a user touches money, the user wants to identify whether the money is genuine money or counterfeit money, and if the user identifies that the touched money is genuine money, the user accepts the genuine money, and if the user identifies that the touched money is counterfeit money, the user refuses to accept the counterfeit money to avoid economic loss. However, since the knowledge and experience of the user are limited and the technology for counterfeiting the currency is high, it is difficult to effectively identify the authenticity of the currency only by the naked eye of the user, and at this time, the user often needs to identify the authenticity of the currency by a currency detector. The cost is required for purchasing the currency detector, and the currency detector is additionally carried and occupies a certain volume of package, so that the user is difficult to identify the truth of the currency in time. In order to identify the authenticity of the currency in time, the image information of the standard currency is pre-stored in a mobile terminal (such as a mobile phone, a tablet personal computer and the like), and the image information comprises depth information and color information. Then, when the user needs to identify the authenticity of the currency, the camera application of the mobile terminal is opened, the currency to be identified is placed in front of the camera, so that a data stream containing image information of the currency appears on a camera preview interface of the mobile terminal, the image information of the currency to be identified is compared with the image information of the standard currency stored in advance, if the similarity of the two is greater than or equal to a preset similarity threshold (for example, greater than or equal to 99%), the currency to be identified is judged to be true currency, otherwise, the currency to be identified is judged to be false currency. Of course, image information of genuine currencies (i.e., standard currencies) of a plurality of different countries is stored in advance so that the genuineness of the currencies of the different countries can be recognized.
The following describes a currency identification method provided in an embodiment of the present application with reference to a specific flowchart, which is detailed as follows:
referring to fig. 1, fig. 1 is a flow chart illustrating a currency recognition method applied to a mobile terminal, the currency recognition method including:
step S11, if the camera of the mobile terminal is started and a currency detection instruction is received, acquiring image information corresponding to currency to be detected in front of the camera, wherein the image information comprises depth information and color information;
the currency detection instruction can be sent by pressing a fixed key arranged on the mobile terminal, and the fixed key can be a special key for sending the currency detection instruction or an existing key of the mobile terminal. Of course, if the current key is an existing key of the mobile terminal, it needs to set a new key response, for example, if the key for sending the currency detection command is an existing volume increasing key of the mobile terminal, and the current key response is: the volume is increased by 10% when the volume increasing key is pressed once, and the volume is increased by 10% when the volume increasing key is continuously pressed. The new key response set may be: the volume is increased by 10% when the volume increasing key is pressed once, and the currency detection instruction is sent when the volume increasing key is continuously pressed.
In some embodiments, the currency detection instruction may also be issued by touching a "currency detection" virtual key displayed by the camera preview interface. Namely, a virtual key for 'currency detection' is added on the camera preview interface, so that the user can know that the mobile terminal has a currency detection function.
In some embodiments, if it is determined that the image information corresponding to the money to be measured in front of the camera is incomplete when the image information corresponding to the money to be measured is acquired, the user is prompted to adjust the distance between the money and the camera.
It should be noted that, if the camera of the mobile terminal is started and the currency detection instruction is not received, the acquired image information does not include the depth information. Wherein the depth of field information may be obtained by a depth camera (which may incorporate Time-of-flight (tof) techniques).
Step S12, comparing the image information of the currency to be measured with the image information of the standard currency;
specifically, the color information of the currency to be tested is compared with the color information of the standard currency to obtain a first comparison result, and the depth of field information of the currency to be tested is compared with the depth of field information of the standard currency to obtain a second comparison result. The first comparison result is used for indicating the similarity of the color information of the currency to be detected and the color information of the standard currency; the second comparison result is used for indicating the similarity of the depth of field information of the currency to be measured and the depth of field information of the standard currency.
And step S13, determining whether the currency to be detected is real currency according to the comparison result.
Specifically, if the first comparison result and the second comparison result both meet the requirement, it is determined that the money to be measured is true money, otherwise, it is determined that the money to be measured is false money.
In the embodiment of the application, if a camera of the mobile terminal is started and a currency detection instruction is received, image information corresponding to currency to be detected in front of the camera is acquired, the image information of the currency to be detected is compared with image information of standard currency, and whether the currency to be detected is real currency or not is determined according to a comparison result. Since the user purchases the mobile terminal and often carries the mobile terminal, the real and false money can be identified by the mobile terminal, so that the timeliness of identification can be improved. Moreover, the acquired image information comprises depth information and color information, so that the accuracy of the judgment result can be improved by determining whether the currency is true according to the comparison result of the depth information and the color information of the currency with the depth information and the color information of the standard currency.
In some embodiments, the image information of the money to be measured may be acquired in two ways, and in this case, the step S11 includes:
a1, if a camera of the mobile terminal is started and a currency detection instruction is received, acquiring preview image information corresponding to currency to be detected in front of the camera;
alternatively, the first and second electrodes may be,
a2, if the camera of the mobile terminal is started and a currency detection command is received, executing a photographing action to obtain image information corresponding to the currency to be detected in front of the camera.
In the above-mentioned a1 and a2, the image information of the money to be measured on the preview interface may be used as the image information of the money to be measured acquired, or the money to be measured may be photographed and the corresponding image information may be acquired based on the photographed money to be measured. When the image information is acquired from the preview interface, the image acquired by executing the photographing action does not need to be stored because the photographing action does not need to be executed, so that the memory of the mobile terminal is saved; when image information is acquired from a shot image, since recognition does not need to be waited after shooting, a user does not need to hold the currency to be detected for a long time, and therefore the participation time required by the user is shortened.
In some embodiments, to obtain more accurate depth information, the following settings are made: whether image information is acquired on a preview interface or image information of the currency to be detected is acquired from a shot image, a plurality of (for example, 30) image frames are required to be acquired to respectively extract depth of field information, then the average value of the respectively extracted depth of field information is obtained, and the obtained average value is used as final depth of field information.
In some embodiments, since only the image information of a certain area may need to be compared in the comparison process, the certain area may be intercepted as the target area, so as to reduce the amount of data to be processed and improve the data processing speed. At this time, the step S12 includes:
b1, intercepting the image information of the target area from the image information of the currency to be detected; specifically, a region of a predetermined size may be cut out from a predetermined direction as a target region from the acquired image region, or, of course, a region of a predetermined size including a specific region may be cut out as a target region after detecting color information having the specific region size. Wherein the area of the target region is smaller than the area of the region where the money to be measured is located.
B2, determining the possible currency type of the currency to be detected according to the color information in the image information of the target area; since the currency type is mainly related to the pattern shape included in the currency, and the pattern shape can be determined according to the color information, in order to reduce the calculation amount, the possible currency type of the currency to be detected only needs to be determined according to the color information. For example, if "national bank" (or "national emblem", etc.) is determined according to the color information of the to-be-tested currency, the possible currency type to which the to-be-tested currency belongs is "renminbi".
B3, determining corresponding standard currency according to the possible currency types of the currency to be detected; specifically, if the possible currency type to which the currency to be tested belongs is RMB, the standard currency is determined as RMB.
And B4, comparing the image information of the target area with the image information of the determined corresponding standard currency.
In real life, the currency value of some countries is very high, so the currency type can be screened by using the currency value to quickly determine the possible currency type to which the currency to be tested belongs, and in this case, B2 includes:
b21, determining the currency value of the currency to be detected according to the color information in the image information of the target area; specifically, the denomination of the money is extracted based on the color distribution of the color information of the money to be measured, for example, referring to fig. 2, the color of the denomination "100" is greatly different from the color of the surrounding area, and the color of the number "100" itself is also different to a certain degree, so that the denomination "100" can be extracted based on these known color differences.
And B22, determining the possible currency type of the currency to be detected according to the currency value of the currency to be detected. Specifically, the money having the specific denomination is determined in advance, so that, when it is determined that the denomination of the money to be measured matches the predetermined denomination, the possible denomination to which the money to be measured belongs is determined as the denomination to which the money matching the specific denomination belongs.
In some embodiments, since the number of currencies having a specific currency value is small, that is, the probability that the currency value of the to-be-detected currency is the specific currency value is small, if it is determined that the currency value of the to-be-detected currency does not belong to the specific currency value, that is, if it is determined that the number of currencies to which the to-be-detected currency may belong is large, in order to reduce the number of currencies to which the to-be-detected currency may belong, after B22, the method includes:
c1, if the number of the determined possible currency types to which the currency to be detected belongs is larger than or equal to a preset number threshold value, determining face information in the currency to be detected according to color information in the image information of the target area;
because one of the two sides of the currency to be detected has the face, the face information of the currency to be detected can be determined through the known face color information of the currency. Of course, if the face information cannot be detected from the acquired image information, the user is prompted to turn the currency to be detected, so that the camera can shoot the other side of the currency to be detected, and then the face information in the turned currency to be detected is determined.
And C2, further screening the possible currency type to which the currency to be detected belongs according to the face information to obtain the possible currency type to which the screened currency to be detected belongs.
Because the face information of different currencies is different, the acquired face information corresponding to different currencies can be compared with the face information extracted from the currency to be detected, the currencies with low matching degree are removed according to the comparison result, and the currencies with high matching degree are reserved as possible currencies to which the filtered currency to be detected belongs.
In some embodiments, in order to improve the accuracy of the comparison result, the target area of the currency to be tested is divided into at least 2 grids, and of course, the corresponding area of the standard currency is also divided into at least 2 grids, where B4 includes:
b41, dividing the target area into at least two grids, wherein one grid of the target area and a corresponding grid in the determined standard currency are used as a grid group;
b42, determining color distribution information, color saturation, brightness information and definition from the color information corresponding to the grids of the target area, and determining the layering, the stereoscopic effect and the thickness of the target area among the pixels from the depth information corresponding to the grids of the target area for each grid group;
wherein, the definition can be determined according to the gradient value of the pixel value; since the currency has a certain concave-convex sense, and has a certain layering sense and a certain three-dimensional effect between different elements (such as national emblems of the RMB currency and elements with different currency values) or in the same element, in order to improve the identification accuracy of the currency, the layering sense (the layering sense is strong when the difference of the distances is large) and the three-dimensional effect (the three-dimensional effect is strong when the difference of the distances is large) between pixels can be determined according to the distance (namely, depth of field information) between the pixels and the camera. Of course, the thickness of the target area may also be determined based on the distance of the specified boundary in the target area from the camera.
B43, comparing the color distribution information, the color saturation, the brightness information and the sharpness determined from the color information corresponding to the mesh of the target area with the standard color distribution information, the standard color saturation, the standard brightness information and the standard sharpness of the corresponding mesh in the standard currency, respectively, and comparing the sense of hierarchy, the stereoscopic effect and the thickness of the target area between the pixels determined from the depth information corresponding to the mesh of the target area with the sense of hierarchy, the standard stereoscopic effect and the thickness of the standard target area between the standard pixels of the corresponding mesh in the standard currency, respectively.
In some embodiments, in order to improve the recognition accuracy of the money, the money recognition method further includes:
acquiring audio data when a motor of the mobile terminal vibrates the currency to be detected;
correspondingly, the step S13 specifically includes:
and determining whether the currency to be detected is true currency or not according to the comparison result and the audio data.
Because the currency is made of specific materials, the swinging process has specific sound. In order to further improve the recognition accuracy of the currency to be detected, the user is prompted to attach the currency to be detected to the mobile terminal, and then the mobile terminal controls the motor to vibrate (for example, controls the motor to vibrate after a preset time after prompting), and controls the microphone to acquire audio data. Since the acquired audio data includes the sound data generated by the vibration of the currency, the sound generated by the vibration of the motor and the environmental noise need to be filtered from the acquired initial audio data, and then the filtered audio data is used as the audio data of the currency to be tested.
It should be understood that, the sequence numbers of the steps in the foregoing embodiments do not imply an execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.
Fig. 3 is a block diagram showing a structure of a money discriminating apparatus provided in an embodiment of the present application, which is applied to a mobile terminal, corresponding to the money discriminating method described in the above embodiment, and only the part related to the embodiment of the present application is shown for convenience of explanation.
Referring to fig. 3, the money discriminating device 3 includes: an image information acquisition unit 31, an image information comparison unit 32, a money identification unit 33, wherein:
an image information obtaining unit 31, configured to obtain image information corresponding to a currency to be detected in front of a camera if the camera of the mobile terminal is started and a currency detection instruction is received, where the image information includes depth information and color information;
the currency detection instruction can be sent out by pressing a fixed key arranged on the mobile terminal;
in some embodiments, the currency detection instruction may also be issued by touching a "currency detection" virtual key displayed by the camera preview interface.
An image information comparing unit 32 for comparing image information of the money to be measured with image information of standard money;
specifically, the color information of the currency to be tested is compared with the color information of the standard currency to obtain a first comparison result, and the depth of field information of the currency to be tested is compared with the depth of field information of the standard currency to obtain a second comparison result. The first comparison result is used for indicating the similarity of the color information of the currency to be detected and the color information of the standard currency; the second comparison result is used for indicating the similarity of the depth of field information of the currency to be measured and the depth of field information of the standard currency.
A money discriminating unit 33 for determining whether the money to be measured is genuine money or not based on the comparison result.
Specifically, if the first comparison result and the second comparison result both meet the requirement, it is determined that the money to be measured is true money, otherwise, it is determined that the money to be measured is false money.
In the embodiment of the application, the user purchases the mobile terminal and can carry the mobile terminal frequently, so that the real and false money can be identified through the mobile terminal, and the identification timeliness can be improved. Moreover, the acquired image information comprises depth information and color information, so that the accuracy of the judgment result can be improved by determining whether the currency is true according to the comparison result of the depth information and the color information of the currency with the depth information and the color information of the standard currency.
In some embodiments, the image information acquiring unit 31 includes:
if a camera of the mobile terminal is started and a currency detection instruction is received, acquiring previewed image information corresponding to currency to be detected in front of the camera;
alternatively, the first and second electrodes may be,
and if the camera of the mobile terminal is started and the currency detection instruction is received, executing a photographing action to acquire image information corresponding to the currency to be detected in front of the camera.
In some embodiments, the image information comparison unit 32 includes:
the image information intercepting module is used for intercepting the image information of the target area from the image information of the currency to be detected;
the possible currency determining module is used for determining the possible currency to which the currency to be detected belongs according to the color information in the image information of the target area;
the standard currency determining module is used for determining corresponding standard currency according to the possible currency types to which the to-be-detected currency belongs;
and the image information comparison module of the target area is used for comparing the image information of the target area with the determined image information of the corresponding standard currency.
In some embodiments, the possible currency determination module includes:
the currency value determining module is used for determining the currency value of the currency to be detected according to the color information in the image information of the target area;
and the possible currency type determining module is used for determining the possible currency type of the currency to be detected according to the currency value of the currency to be detected.
In some embodiments, the money discriminating device 3 includes:
the face information determining module is used for determining face information in the currency to be detected according to color information in the image information of the target area if the determined number of the possible currency types to which the currency to be detected belongs is larger than or equal to a preset number threshold;
and the currency screening module is used for further screening the possible currency to which the currency to be detected belongs according to the face information to obtain the possible currency to which the screened currency to be detected belongs.
In some embodiments, the image information comparison module of the target region comprises:
the target area dividing module is used for dividing the target area into at least two grids, and one grid of the target area and a corresponding grid in the determined standard currency are used as a grid group;
the color distribution information determining module is used for determining color distribution information, color saturation, brightness information and definition from the color information corresponding to the grids of the target area and determining the layering, the three-dimensional effect and the thickness of the target area from the depth information corresponding to the grids of the target area;
and the color distribution information comparison module is used for comparing the color distribution information, the color saturation, the brightness information and the definition determined from the color information corresponding to the grids of the target area with the standard color distribution information, the standard color saturation, the standard brightness information and the standard definition of the corresponding grids in standard currency respectively, and comparing the layering sense, the stereoscopic effect and the thickness of the target area determined from the depth of field information corresponding to the grids of the target area with the layering sense, the standard stereoscopic effect and the thickness of the standard target area between the standard pixels of the corresponding grids in the standard currency respectively.
In some embodiments, the money identifying device 3 further includes:
the audio data acquisition unit is used for acquiring audio data when a motor of the mobile terminal vibrates the currency to be detected;
correspondingly, the currency recognition unit 33 is specifically configured to:
and determining whether the currency to be detected is true currency or not according to the comparison result and the audio data.
It should be noted that, for the information interaction, execution process, and other contents between the above-mentioned devices/units, the specific functions and technical effects thereof are based on the same concept as those of the embodiment of the method of the present application, and specific reference may be made to the part of the embodiment of the method, which is not described herein again.
Fig. 4 is a schematic structural diagram of a mobile terminal according to an embodiment of the present application. As shown in fig. 4, the mobile terminal 4 of this embodiment includes: at least one processor 40 (only one processor is shown in fig. 4), a memory 41, and a computer program 42 stored in the memory 41 and executable on the at least one processor 40, the processor 40 implementing the steps in any of the various method embodiments described above when executing the computer program 42:
if a camera of the mobile terminal is started and a currency detection instruction is received, acquiring image information corresponding to currency to be detected in front of the camera, wherein the image information comprises depth information and color information;
comparing the image information of the currency to be detected with the image information of standard currency;
and determining whether the currency to be detected is true currency or not according to the comparison result.
The mobile terminal 4 may be a desktop computer, a notebook, a palm computer, a cloud server, or other computing devices. The mobile terminal may include, but is not limited to, a processor 40, a memory 41. Those skilled in the art will appreciate that fig. 4 is merely an example of the mobile terminal 4 and does not constitute a limitation of the mobile terminal 4 and may include more or less components than those shown, or some components may be combined, or different components may include, for example, input and output devices, network access devices, etc.
The Processor 40 may be a Central Processing Unit (CPU), and the Processor 40 may be other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic device, discrete hardware component, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The memory 41 may in some embodiments be an internal storage unit of the mobile terminal 4, such as a hard disk or a memory of the mobile terminal 4. The memory 41 may also be an external storage device of the mobile terminal 4 in other embodiments, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), and the like, which are provided on the mobile terminal 4. Further, the memory 41 may also include both an internal storage unit and an external storage device of the mobile terminal 4. The memory 41 is used for storing an operating system, an application program, a BootLoader (BootLoader), data, and other programs, such as program codes of the computer program. The memory 41 may also be used to temporarily store data that has been output or is to be output.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-mentioned functions. Each functional unit and module in the embodiments may be integrated in one processing unit, or each unit may exist alone physically, or two or more units are integrated in one unit, and the integrated unit may be implemented in a form of hardware, or in a form of software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working processes of the units and modules in the system may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
An embodiment of the present application further provides a network device, where the network device includes: at least one processor, a memory, and a computer program stored in the memory and executable on the at least one processor, the processor implementing the steps of any of the various method embodiments described above when executing the computer program.
The embodiments of the present application further provide a computer-readable storage medium, where a computer program is stored, and when the computer program is executed by a processor, the computer program implements the steps in the above-mentioned method embodiments.
The embodiments of the present application provide a computer program product, which when running on a mobile terminal, enables the mobile terminal to implement the steps in the above method embodiments when executed.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, all or part of the processes in the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium and can implement the steps of the embodiments of the methods described above when the computer program is executed by a processor. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer readable medium may include at least: any entity or device capable of carrying computer program code to a photographing apparatus/terminal apparatus, a recording medium, computer Memory, Read-Only Memory (ROM), random-access Memory (RAM), an electrical carrier signal, a telecommunications signal, and a software distribution medium. Such as a usb-disk, a removable hard disk, a magnetic or optical disk, etc. In certain jurisdictions, computer-readable media may not be an electrical carrier signal or a telecommunications signal in accordance with legislative and patent practice.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus/network device and method may be implemented in other ways. For example, the above-described apparatus/network device embodiments are merely illustrative, and for example, the division of the modules or units is only one logical division, and there may be other divisions when actually implementing, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not implemented. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.

Claims (10)

1. A currency identification method is applied to a mobile terminal, and comprises the following steps:
if a camera of the mobile terminal is started and a currency detection instruction is received, acquiring image information corresponding to currency to be detected in front of the camera, wherein the image information comprises depth information and color information;
comparing the image information of the currency to be detected with the image information of standard currency;
and determining whether the currency to be detected is true currency or not according to the comparison result.
2. The currency recognition method according to claim 1, wherein the obtaining of the image information corresponding to the currency to be detected in front of the camera if the camera of the mobile terminal is activated and the currency detection command is received comprises:
if a camera of the mobile terminal is started and a currency detection instruction is received, acquiring previewed image information corresponding to currency to be detected in front of the camera;
alternatively, the first and second electrodes may be,
and if the camera of the mobile terminal is started and the currency detection instruction is received, executing a photographing action to acquire image information corresponding to the currency to be detected in front of the camera.
3. The money discriminating method according to claim 1, wherein the comparing the image information of the money to be measured with the image information of the standard money includes:
intercepting image information of a target area from the image information of the currency to be detected;
determining the possible currency type of the currency to be detected according to the color information in the image information of the target area;
determining corresponding standard currency according to the possible currency types of the currency to be detected;
and comparing the image information of the target area with the determined image information of the corresponding standard currency.
4. A currency identification method as claimed in claim 3, wherein said determining the possible currency to which the currency to be tested belongs based on the color information in the image information of the target area comprises:
determining the currency value of the currency to be detected according to the color information in the image information of the target area;
and determining the possible currency type of the currency to be detected according to the currency value of the currency to be detected.
5. The currency identification method according to claim 4, wherein after said determining the possible currency to which the currency to be tested belongs based on the currency value of the currency to be tested, comprising:
if the determined number of the possible currency types to which the currency to be detected belongs is larger than or equal to a preset number threshold, determining face information in the currency to be detected according to color information in the image information of the target area;
and further screening the possible currency type to which the currency to be detected belongs according to the face information to obtain the possible currency type to which the screened currency to be detected belongs.
6. A currency identification method according to claim 3, wherein said comparing image information of said target area with image information of a determined corresponding standard currency comprises:
dividing the target area into at least two grids, wherein one grid of the target area and a corresponding grid in the determined standard currency are used as a grid group;
for each grid group, determining color distribution information, color saturation, brightness information and definition from color information corresponding to the grid of the target area, and determining layering, stereoscopic effect and thickness of the target area among pixels from depth information corresponding to the grid of the target area;
comparing color distribution information, color saturation, brightness information, and sharpness determined from the color information corresponding to the mesh of the target area with standard color distribution information, standard color saturation, standard brightness information, and standard sharpness of a corresponding mesh in standard currency, respectively, and comparing the sense of layering between pixels, the stereoscopic effect, and the thickness of the target area determined from the depth of field information corresponding to the mesh of the target area with the sense of layering between standard pixels, the standard stereoscopic effect, and the thickness of the standard target area of a corresponding mesh in standard currency, respectively.
7. The money discriminating method according to any one of claims 1 to 6, further comprising:
acquiring audio data when a motor of the mobile terminal vibrates the currency to be detected;
correspondingly, the step of determining whether the currency to be detected is true currency according to the comparison result specifically includes:
and determining whether the currency to be detected is true currency or not according to the comparison result and the audio data.
8. A money discriminating apparatus, applied to a mobile terminal, comprising:
the currency detection device comprises an image information acquisition unit, a currency detection unit and a currency detection unit, wherein the image information acquisition unit is used for acquiring image information corresponding to currency to be detected in front of a camera if the camera of the mobile terminal is started and receives a currency detection instruction, and the image information comprises depth of field information and color information;
an image information comparing unit for comparing the image information of the money to be measured with the image information of the standard money;
and the currency identification unit is used for determining whether the currency to be detected is true currency or not according to the comparison result.
9. A mobile terminal comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that the processor implements the method according to any of claims 1 to 7 when executing the computer program.
10. A computer-readable storage medium, in which a computer program is stored which, when being executed by a processor, carries out the method according to any one of claims 1 to 7.
CN202010104266.6A 2020-02-20 2020-02-20 Currency identification method and device and mobile terminal Pending CN111275879A (en)

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